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CompTIA Cloud+ (CV0-004) glossary

Terms selected for CompTIA Cloud+ (CV0-004) based on common objective language and practice focus.

Hybrid Cloud

Cloud model combining private and public cloud resources.

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IaaS

Infrastructure as a Service offering virtualized compute, storage, and networking.

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PaaS

Platform as a Service model providing managed runtime and development stack.

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Private Cloud

Cloud infrastructure dedicated to one organization.

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Public Cloud

Cloud services delivered by third-party providers over internet.

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SaaS

Software as a Service where applications are accessed over the internet.

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Virtual Machine

Software-defined computer running as an isolated guest system.

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Virtualization

Abstraction technology that runs multiple isolated environments on shared hardware.

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Hypervisor

Software layer that creates and manages virtual machines.

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Availability Zone (AZ)

One or more discrete data centers in a Region with independent power, cooling, and networking.

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Autoscaling

Automatic adjustment of compute resources based on workload demand.

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Block Storage

Storage model exposing raw blocks to systems, often used for VM disks and databases.

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Cloud Bursting

Pattern where workloads run on-premises but temporarily extend into public cloud under peak demand.

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Cloud Orchestration

Coordinated automation of multi-step cloud operations and resource lifecycles.

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Cold Site

Disaster recovery facility with minimal pre-installed systems requiring setup before use.

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Container Image

Packaged filesystem and runtime instructions used to create containers.

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Containerization

Application packaging method that bundles code and dependencies into isolated runtime units.

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Docker

Popular platform and tooling ecosystem for building and running containers.

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Elasticity

Ability to dynamically scale resources up or down as demand changes.

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Failover

Automatic or manual switch to standby components when primary systems fail.

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Fault Tolerance

System capability to continue operating despite component failures.

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File Storage

Storage model exposing shared hierarchical filesystems over network protocols.

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High Availability

Design goal of maximizing uptime through redundancy and resilient architecture.

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Hot Site

Fully provisioned disaster recovery site that can assume workloads quickly.

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IAM

Identity and access management framework for controlling who can access what.

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Immutable Infrastructure

Deployment model where systems are replaced rather than modified in place.

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Infrastructure as Code (IaC)

Managing and provisioning infrastructure through declarative or scripted definitions.

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Kubernetes

Container orchestration platform for deploying, scaling, and managing containerized workloads.

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Latency

Time delay between request and response in a system or network.

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Load Balancer

Service or device that distributes traffic across multiple backend resources.

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Metrics

Quantitative measurements used to monitor system behavior and performance.

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Multicloud

Strategy using services from multiple cloud providers within one environment.

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Network ACL (NACL)

Stateless subnet-level traffic filter that evaluates ordered allow and deny rules.

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Object Storage

Storage model that manages data as objects with metadata in flat namespaces.

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Observability

Ability to understand system state using telemetry such as logs, metrics, and traces.

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Region

Geographic cloud area containing multiple availability zones.

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RPO

Recovery Point Objective, the maximum acceptable data loss measured in time.

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RTO

Recovery Time Objective, the target duration to restore service after disruption.

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Scalability

Capacity of a system to handle growth in workload by adding resources.

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Security Group

Stateful virtual firewall attached to AWS resources, controlling allowed inbound and outbound traffic.

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Service Level Agreement (SLA)

Formal commitment defining service expectations such as uptime and support response.

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Shared Responsibility Model

Cloud security model dividing protection duties between provider and customer.

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Snapshot

Point-in-time copy of storage state used for backup, rollback, or cloning.

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Warm Site

Partially provisioned recovery site with moderate activation time.

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VPC

Virtual Private Cloud, an isolated virtual network environment in cloud infrastructure.

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NTP

Network Time Protocol used to synchronize clocks across systems.

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Throughput

Actual rate of successful data transfer through a network path.

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Zero-Touch Provisioning

Automated onboarding method that configures devices with minimal manual intervention.

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CASB

Cloud Access Security Broker that enforces security policy for cloud service use.

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Supply Chain Risk

Security risk introduced through vendors, software components, or service providers.

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Ansible

Automation platform used for configuration management and orchestration.

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